Wrench.



H. G. NIMSGERN.

WEENGH.

APPLICATION FILED MAY 18, 1911.

1,095,347, Patented May 5, 1914.

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COLUMBIA PLANOGRAPH co WASHINGTON D c H. C. NIMSGERN.

WRENCH.

APPLICATION FILED MAY 18, 1911.

1,095,347. Patented May 5, 1914.

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HARRY G. NIMSGER-N, 0F BROWN STATION, NEW YORK.

WRENCH.

Specification of Letters Patent.

Application filed'May 18, 1911.

rammed May 5, 1914.

Serial No. 627,910.

To all whom it may concern Be it known that I, HARRY C. NIMsoERN, acitizen of the United States, residing at Brown Station, in the countyof Ulster and State of New York, have invented certain new and usefulImprovements in IVrenches, of which the following is a specification.

wrenches, and has for its leading object the provision of an improvedwrench of the clutched head type.

A further object of the invention is the provision of a wrench having animproved character or means for radially adjusting a plurality of jawssimultaneously to cause said jaws to firmly engage a nut or bolttherebetween.

Another object of the invention is the prostood that I may make anychanges in the specific structure shown and described within the scopeof the claims without departing from or exceeding the spirit of myinvention.

Figure 1 represents a top plan view of my wrench. Fig. 2 represents aside elevation thereof. Fig. 3 represents a sectional view on line P4 ofFig. 1. Fig. 4 represents a sectional view on line 55 of Fig. 1, saidsection passing through the handle. Fig. 5 represents a section on theline 77 of Fig. 2.

In the drawings, in which similar characters of reference are employedto denote corresponding parts in the several views, the numeral 1designates the head plate of my wrench, said plate having the radiallyeX- tending slots 2 formed therein and extending at right angles to eachother, there being an enlarged central recess 3 at the intersection ofsaid slots to facilitate the introduction of the jaw members of mywrench into the slots. Said jaw members, as best shown in the detailedview, comprise a lower gripping portion of trapezoidal shape in crosssection, said gripping portion 4 having formed at its upper end the neck5 suiticiently reduced in thickness to'fit into one of the slots 2,while above the neck is a second trapezoidal shaped portion 6 havingprojecting therefrom the lugs 7 having a fiat inner face or engaging jaw8 with tapered outer faces 9 and having the threaded out- My inventionrelates to improvements in wardly flaring portion 10 extending fromthe'portion 6' of the jaw for the greater portion of the length of themembers 7, the

portion 9 converging from the outer end of said threaded face.

To adjust the position of the jaws with respect to each other, I engageon the segmental threads 10 of the four jaws the interiorly threadedclamping nut or ring 11 having a beveled threaded face 12 which rides onthe threads 10, said member 11 being of size to engage the outermostthreads 10 to tightly compress said jaws.- It will thus be seen that therotation of said member 11 will cause it to rise up on the inclinedthreaded faces of the jaws and thus to force the jaws together, while tonormally hold the jaws apart and in engagement with the ring when thejaws are not clamped against a nut or bolt, I engage between oppositejaws the bolt spring 13 having its ends bearing against the jaws andtending to hold the same apart. The ring 11 is split so that the samemay be placed in its proper position,

whereupon the same is welded and becomes a permanent partof the device.

From the foregoing description taken in connection with thedrawings, theconstruction and adjustment of my improved jaw members will be readilyunderstood, and it will be seen that I have provided a jaw head havingsliding jaws mounted therein for engaging four sides of a nut or bolt,which jaws are provided with double gripping faces disposed on oppositesides of the wrench head, whereby the heavier jaws or portions 4 aremore securely held by the clamping ring 11 when the jaws are in greatestspaced position and the actionof the ring is reinforced by the bearingof the necks 5 against the ends of the slot, while the tapered ends 9are closer to and more firmly held by the ring and are also betteradapted for use when the jaws are close together to engage a small nutor bolt.

To operate the wrench head, I have secured to the periphery of the headplate 1 the annulus or hand 14 having its edges projecting on each sideof the head plate 1 and being secured to said head plate by the screws15 which pass centrally through the band and are engaged in socketsformed radially in the head plate. Spanning said band 1 1 are thefurcations 16 of the handle 17, said fur-cations having the inwardlyextending ends 18 engaging the inner face of the annulus 1d to retainthe handle in position while permitting of its rotative movement withrespect to the head plate or disk 1. The band 1 1 has formed on itsouter surface the lugs 19 which perform the functions of ratchet teeth,while pivotally supported between the furcations 16 by the bolt 20 isthe curved double pawl 21 having the engaging points 22 and 23 extendinginward from opposite ends and adapted to engage the lugs 19.

To cause the pawl member 21 to engage the lugs 19 when the handle ismoved in one direction to lock the head to move with the handle and toallow the pawl to ride idly over the lugs to allow the handle to bemoved in the opposite direction independently of the wrench head, and topermit of the adjustment of the device to cause the pawl to engage whenthe handle is moved in either direction as desired, I have provided animproved resilient pawl engaging collar 24. Said collar 24: iseccentrically mounted on the handle 17 and has the enlarged portion 25from which depends a lug 26 adapted to be engaged in one of the sockets27 formed in the outer face of the pawl 21. An abutment collar 28 issecured on the handle and has bearing thereagainst the outer end of thespring 29 having its other end bearing against the collar 24 to forcethe same downward against the pawl.

It will be seen that the enlarged or eccentric portion 25 of the collarand its depending lug 26 will engage one side of the pawl to force thesame downward while the other side swings upward entirely free of thelugs 19. As the handle is shifted in one direction the pawl point 23will engage between two of the lugs 19 and will force the wrench head torotate with the handle, while when the handle is moved in the oppositedirection the point 23 will ride upward over the lugs 19, the spring 29yielding to allow the collar 2 to rise but holding the pawl with thepoint 23 as far depressed as possible to prevent the opposite point 22from engaging the lugs 19. To cause the point 22 to operate and raisethe point 23 into inoperative position it is merely necessary to forcethe collar 24-. upward to disengage the 111 26 from the socket 27 andthen give the collar 25 a half-rotation and engage the lug 26 in thesocket 27 of the arm bearing the point 22.

It will be apparent from the preceding description that I have providedan extremely simple, durable, and efiicient ratchet band which may beeasily secured to the head of the wrench and that I have furtherprovided a handle for coaction with said band, which handle is providedwith a double pawl and with improved means for holding one arm of thepawl in operative and the other in inoperative position and forreversing the position of the ends of the pawl as desired. It willfurther be apparent that I have provided an improved wrench of theclutch head type which will commend itself to all on account of thesimplicity and efiicieney of the jaw adjusting means and of thesimplicity and efficiency of the means for clutching and turning the jawhead.

In order to enable my wrench to readily grasp either square or hexagonalnuts, 1 form in the gripping faces of the jaws, the V-shaped grooves orrecesses 30 to engage the corners of the nuts.

I claim:

1. A wrench comprising a slotted head plate, jaws adj ustably mounted inthe slots of the head plate, means for adjusting the jaws, an annulusengaged with the head plate and surrounding the latter, said annulusbeing secured to the head plate and projecting beyond the opposite sidefaces of said plate, spaced lugs carried by the outer face of theannulus, a handle having furcations at one end disposed at oppositesides of the annulus, said furcations having inwardly turned endsextending over the projecting portions of the annulus, a pawl pivotedbetween the furcations outwardly of the annulus and extending oppositelybeyond the handle and arranged for ei'igagement of the lugs alternatelyat its ends, said handle having a shoulder at the rear of itsfurcations, a collar slid-ably and rotatably mounted on the handlereaiumrdly of the shoulder, a stop on the handle rearwardly of thecollar, a spring engaged with the handle between the stop and thecellar, and a pin carried by the collar outwardly of the handle, saidcollar being rotatable to engage the pin alternately with the pawl atopposite sides of the handle.

2. A ratchet wrench comprising a head, jaws carried by the head, ratchetlugs carried by the head, a handle movably engaged with the head, saidhandle including furcations and a shoulder at the rearward side of thefurcations, a pawl pivoted between the furcations and extendingoppositely therebeyond, said pawl being adapted for engagement of itsends alternately with the ratchet lugs of the head, said pawl havingalso recesses in its rearward face at opposite sides of the furcations,a collar slidably and rotatably mounted upon the handle rearwardly ofthe shoulder, a stop on the handle In testimony whereof I afiix mysignature, rearwardly of the collar, a spring engaged in the presence oftwo witnesses. with the handle between the stop and the collar, and apin carried by the collar and HARRY NIMSGERN' 5 movable with the collarfor engagement in- Witnesses:

terchangeably in the depressions of the H. J. BEARDY,

pawl. RAPHAEL OSCAR.

7 Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G.

